Tadiran Telecom EMERALD ICE, Installation & Maintenance Manual, Page: 31 / 536

2-6
Emerald ICE Installation & Hardware Reference Manual
System
Design
2
The 610+2 is the large circuit board that is packaged inside of KSU1. It 610+2
provides interface for up to 6 loop ‐ start CO Lines, 10 Digital Extension Ports and 2
analog ports. Additionally the 610+2 regulates the 24 volt DC power from the
source to produce all required logic voltages and operations voltages. There is also
a Power Failure Port located on the 610+2 that is connected to the first CO Line
circuit. Whenever power fails this port becomes active with dial tone from the CO
line connected to the first CO line port.
Figure 2-5 610+2 Board
Each CO line circuit on the 610+2 board incorporates over ‐ voltage protection, ring
detector, loop detector, loop/pulse ‐ dial relay, current sink circuit,
coupling/isolation transformer (impedance 600:600), hybrid circuit, CODEC &
filter, polarity guard circuit and Radio Frequency noise filter.
The sixth CO Line port is equipped with CNG Fax Tone Detection circuitry. If
FAX tone is detected, the call is routed to the analog port designated as the
destination for fax calls.
Each digital port (connects to Deluxe & Standard Telephones and DSS Consoles) is
comprised of a proprietary octal ASIC (Application Specific Integrated Circuit)
transceiver. There are three data channels in operation at each digital port via the
octal transceiver. One channel is used for call processing control of digital terminal
2.5
610+2 (KSU1 Component)